Research and Simulation on Over-Modulation Method of Matrix Converter

For the maximum voltage transferring ratio only being 0.866in matrix converter,this paper studies two over-modulation strategies based on output voltage space vector of matrix converter.The space vector modulation control zone is divided into linear modulation zone and over-modulation zone.The over-modulation zone is divided into over-modulation zoneⅠ and over-modulation zone II.The over-modulation strategies are implemented in the over-modulation zone,combining input current space vector modulation with output voltage space vector over-modulation.In the over-modulation strategies,based on difference of voltage regulation ratio,we select different reference voltage adjusting schemes to realize over-modulation.The simulation research on over-modulation schemes is carried out in Matlab/Simulink.The simulation results show that the over-modulation schemes can effectively increase the maximum voltage transferring ratio of matrix converter.